A Study to Investigate the Safety, Tolerability and Pharmacokinetics of Repeat Dose Administration of Long-Acting GSK1265744 and Long-Acting TMC278 Intramuscular and Subcutaneous Injections in Healthy Adult Subjects

LAI115428 is a Phase I, randomized, repeat dose escalation study to determine the safety, tolerability, and PK profile of intramuscular and subcutaneous injections of GSK1265744 in a long acting parenteral (LAP) formulation in healthy subjects. Subjects will be randomized to 3 monthly dosing cohorts and 1 quarterly dosing cohort with either intramuscular or subcutaneous dosing. In the monthly dosing cohorts subjects will receive GSK1265744 alone for 2 months and then in combination with TMC278 long acting parenteral (LA) for 2 months. For the quarterly dosing cohort, 2 quarterly intramuscular doses of GSK1265744 LAP will be given alone. Three dose levels of GSK1265744 will be evaluated partly in combination with TMC278 LA to adequately characterize the GSK1265744 LAP and TMC278 LA safety, tolerability, and PK profile. A total enrolment of approximately 40 healthy subjects is planned for this study.

A Randomized, Open Label Study to Investigate the Safety, Tolerability and Pharmacokinetics of Repeat Dose Administration of Long-Acting GSK1265744 and Long-Acting TMC278 Intramuscular and Subcutaneous Injections in Healthy Adult Subjects

Composite of PK parameters following single and repeat dose intramuscular or subcutaneous administration [ Time Frame: approximately 25 weeks ] [ Designated as safety issue: No ]

Measurements include: area under the plasma concentration time curve over the dosing interval (AUC(0-t)), maximum observed concentration (Cmax), time to maximum observed concentration (tmax), concentration at the end of the dosing interval (Ct).

Measurements include: area under the plasma concentration time curve over the dosing interval (AUC(0-t)), maximum observed concentration (Cmax), time to maximum observed concentration (tmax), concentration at the end of the dosing interval (Ct).

Measurements include: area under the plasma concentration time curve over the dosing interval (AUC(0-t)), maximum observed concentration (Cmax), time to maximum observed concentration (tmax), concentration at the end of the dosing interval (Ct).

Composite of PK parameters following each dose administration at different dose levels for the assessment of dose proportionality and relative exposure [ Time Frame: approximately 25 weeks ] [ Designated as safety issue: No ]

GSK1265744 LAP injection given subcutaneously once a month for 4 months

Drug: GSK1265744 LAP 800mg intramuscular injection

800mg Loading dose given at month 1 dose

Other Name: GSK1265744

Drug: GSK1265744 LAP 200mg subcutaneous injection

200mg maintenance dose give at months 2 - 4

Other Name: GSK1265744

Experimental: Cohort 2

GSK1265744 LAP injection given intramuscularly once a month for 4 months. TMC278 LA + GSK1265744 given in Month 3 and 4.

Drug: GSK1265744 LAP 800mg intramuscular injection

800mg Loading dose given at month 1 dose

Other Name: GSK1265744

Drug: GSK1265744 LAP 200mg intramuscular injection

200mg maintenance dose given at months 2 - 4

Other Name: GSK1265744

Drug: TMC278 LA 1200mg intramuscular injection

1200mg Loading dose given at month 3

Other Name: TMC278 LA

Drug: TMC278 LA 600mg intramuscular injection

600mg Loading dose given at month 4

Other Name: TMC278 LA

Experimental: Cohort 3

GSK1265744 LAP injection given intramuscularly once a month for 4 months. TMC278 LA + GSK1265744 given in Month 3 and 4.

Drug: GSK1265744 LAP 800mg intramuscular injection

800mg Loading dose given at month 1 dose

Other Name: GSK1265744

Drug: GSK1265744 LAP 400mg intramuscular injection

400mg maintenance dose given at month 2 - 4

Other Name: GSK1265744

Drug: TMC278 LA 1200mg intramuscular injection

1200mg Loading dose given at month 3

Other Name: TMC278 LA

Drug: TMC278 LA 600mg intramuscular injection

600mg Loading dose given at month 4

Other Name: TMC278 LA

Experimental: Cohort 4

GSK1265744 LAP injection given intramuscularly once every 12 weeks.

Drug: GSK1265744 LAP 800mg intramuscular injection

800mg dose given quarterly (once every) 12 weeks

Other Name: GSK1265744

Eligibility

Ages Eligible for Study:

18 Years to 64 Years

Genders Eligible for Study:

Both

Accepts Healthy Volunteers:

Yes

Criteria

Inclusion Criteria:

AST, ALT, alkaline phosphatase and bilirubin greater than or equal to 1.5xULN (isolated bilirubin >1.5xULN is acceptable if bilirubin is fractionated and direct bilirubin <35%).

Healthy as determined by a responsible and experienced physician, based on a medical evaluation including medical history, physical examination, laboratory tests and cardiac monitoring. A subject with a clinically significant abnormality or laboratory parameters outside the reference range for the population being studied may be included only if the Investigator and the GSK Medical Monitor agree that the finding is unlikely to introduce additional risk factors and will not interfere with the study procedures.

Male or female between 18 and 64 years of age inclusive, at the time of signing the informed consent.

Females of childbearing potential with a negative pregnancy test (serum or urine) at screen and at Day -21, and agrees to use one of the contraception methods listed in the protocol for an appropriate period of time (as determined by the product label or investigator) prior to the start of dosing to sufficiently minimize the risk of pregnancy at that point. Female subjects must agree to use contraception for six months after the final dose of study drug.

Body weight greater than or equal to 50 kg for men and greater than or equal to 45 kg for women and body mass index (BMI) within the range 18.5-31.0 kg/m2 (inclusive).

All Study subjects should be counseled on the practice of safer sexual practices including the use of effective barrier methods (e.g. male condom/spermicide).

High-risk behavior for HIV infection including one of the following risk factors within six months before entering the study (day 1): Unprotected vaginal or anal sex with a known HIV infected person or a casual partner, engaged in sex work for money or drugs, acquired a sexually transmitted disease, high risk partner currently or in the previous six months.

Current or chronic history of liver disease, or known hepatic or biliary abnormalities (with the exception of Gilbert's syndrome or asymptomatic gallstones).

A positive pre-study (screening and Day -21) drug/alcohol screen.

History of regular alcohol consumption within 6 months of the study as defined in the protocol.

The subject has participated in a clinical trial and has received an investigational product within the following time period prior to the first dosing day in the current study: 30 days, 5 half-lives or twice the duration of the biological effect of the investigational product (whichever is longer).

Exposure to more than four new chemical entities within 12 months prior to the first dosing day.

Refrain from use of prescription or non-prescription drugs, herbal and dietary supplements (including St John's Wort) within 7 days (or 14 days if the drug is a potential enzyme inducer) or 5 half-lives (whichever is longer) prior to the first dose of study medication, unless in the opinion of the Investigator and GSK Medical Monitor the medication will not interfere with the study procedures or compromise subject safety.

History of sensitivity to any of the study medications, or components thereof or a history of drug or other allergy that, in the opinion of the investigator or GSK Medical Monitor, contraindicates their participation. If heparin is used during PK sampling, subjects with a history or sensitivity to heparin or heparin-induced thrombocytopenia should not be enrolled.

The subject has a tattoo or other dermatological condition overlying the gluteus and/or abdominal region which may interfere with interpretation of injection site reactions.

Where participation in the study would result in donation of blood or blood products in excess of 500 mL within a 56 day period.

Pregnant females as determined by positive serum or urine hCG test at screening or prior to dosing.

Unwillingness or inability to follow the procedures outlined in the protocol.

Subject is mentally or legally incapacitated.

The subject's systolic blood pressure is outside the range of 90-140mmHg, or diastolic blood pressure is outside the range of 45-90mmHg or heart rate is outside the range of 50-100bpm for female subjects or 45-100 bpm for male subjects.

History of clinically significant cardiovascular disease.

Contacts and Locations

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Please refer to this study by its ClinicalTrials.gov identifier: NCT01593046